Bizarre Patents
Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 7431305 | Oil scraper ring ring groove arrangement for pistons of internal combustion engines The invention relates to an oil scraper ring groove ring arrangement for pistons of internal combustion engines. The inventive arrangement comprises a disk that is provided with parallel flanks and a bearing surface having an asymmetrical crowned form with a vertex ... | 10/07/2008 |
| 7261301 | Oil scraper ring for pistons of internal combustion engines The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the perip... | 08/28/2007 |
| 7234704 | Wiping and/or sealing element as well as process for sealing a piston and clamping and/or support element The present invention pertains to a wiping and/or sealing element for sealing a piston (11) guided movably in a housing (10) with a seal held in a groove (21, 30). The present invention pertains, furthermore, to a process for sealing a movable p... | 06/26/2007 |
| 7210398 | Cover seals with latching locking features Seal apparatus includes a cover seal having a body and an extending cylindrical sleeve with the sleeve including a radial internal groove. A piston is provided having a circumferential groove and a biasing element is disposed between the internal and circumferential... | 05/01/2007 |
| 7077402 | Combined oil ring A combined oil ring 4 is comprised of an oil ring 5 having upper and lower rails 7 and 8, and an expander 6 for applying contact pressure radially outwards on the oil ring 5. The outer circumferential surface 11 of th... | 07/18/2006 |
| 7044473 | Piston and piston ring assembly Two seal rings are provided comprising an upper ring and a lower ring, the rings having a common axis, a common outer cylindrical surface, a common inner cylindrical surface, and a couple of facing surfaces. The facing surfaces form an engaging length in a radial se... | 05/16/2006 |
| 7017914 | Piston assembly and method of manufacture A piston assembly having a piston and a piston ring. The ring mates to the piston in a groove on the outer surface of the piston. The ring includes two side walls that connect between inner and outer peripheral walls. The side walls converge outwardly at different a... | 03/28/2006 |
| 6920819 | Uniform piston ring fill A piston and ring assembly for a compressor that may be used in a vehicle air conditioning system. The assembly comprises a piston and a ring located within a cylinder bore. The ring has a frustoconical shape and the piston has a complementary frustoconical groove. ... | 07/26/2005 |
| 6682078 | Ring groove for oil ring with coil expander of piston A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring gro... | 01/27/2004 |
| 6547251 | Ring groove for oil ring with coil expander of piston A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring gro... | 04/15/2003 |
| 6361050 | Oppositely angled piston ring grooves A piston is disclosed having both downwardly and upwardly inclined piston ring grooves, the grooves being angled less than approximately ten degrees with respect to a horizontally extending axis. In a preferred embodiment, the grooves are less than approx... | 03/26/2002 |
| 6305265 | Method and apparatus for pressurizing vaporous fluids Pump apparatus according to the present invention may comprise a pump body having a bore therein and a piston mounted within the bore so that the piston may be reciprocated within the bore between first and second positions. A sleeve seal assembly mounted... | 10/23/2001 |
| 6039321 | Piston ring device for use in a combustion engine of a vehicle A piston ring device for use in a combustion engine of a vehicle includes a compressing ring, a zigzag-shape oil ring and an auxiliary ring which is piled up from the auxiliary ring and combined with each other, so that the piston ring device can be easil... | 03/21/2000 |
| 5271315 | Pressure balanced piston rings Force balanced (or nearly balanced) rings to eliminate (or greatly reduce) pressure caused force build up of the ring(s) against the cylinder wall. Especially important in high pressure engines and/or where increased depth ring/cylinder contact surface is... | 12/21/1993 |
| 5197746 | Substantially zero leakage path sealing assembly with expander void This invention relates to a fliud sealing mechanism for the inside diameter and/or the outside diameter of a piston-cylinder arrangement. This device results in substantially zero seal leakage path with low differential seal pressure required using only o... | 03/30/1993 |
| 5133563 | Two ring piston with lower tapered L-shaped ring Piston rings for internal combustion engines and compressors are described. The piston ring comprises a generally "L-shaped" cross section and may be used in place of a conventional oil control piston ring. It may fulfill an exclusively oil scraping funct... | 07/28/1992 |
| 5035210 | Piston assembly of internal combustion engine A piston assembly of an internal combustion engine is provided with a piston structure with which oil comsumption is suppressed. A piston of the assembly is disposed inside each cylinder wall of the engine and formed with a top land and the second land. A... | 07/30/1991 |
| 4936269 | Method and apparatus for reduced oil consumption and oil deterioration in reciprocating engines A method and apparatus for reducing oil consumption and oil deterioration in a reciprocating engine. The engine is provided with ceramic rings and ceramic cylinder linings. Minimal oil lubricant is adsorbed on the surface layer of the rings and liners to ... | 06/26/1990 |
| 4883029 | Piston and piston ring construction A piston assembly comprising a piston reciprocally movable along an axis and including a generally cylindrical outer surface having therein a circumferentially extending groove partially defined by a surface having therein a recess, and a piston ring loca... | 11/28/1989 |
| 4785922 | Gun recoil mechanism A constant-pressure hydraulic shock-absorbing device suitable for use as a recoil brake in a weapon system. By use of a piston that decreases in diameter as the applied force increases, a constant resistive force independent of the applied force is obtain... | 11/22/1988 |
| 4713041 | Non-lubricated drive belt system for a continually variable transmission A belt driven automatic transmission for producing a continuous range of drive ratios includes an input pulley rotatably mounted on the axis of an engine crankshaft and an output pulley rotatably supported on the axis of the transmission output shaft. The... | 12/15/1987 |
| 4544049 | Wheel cylinder assembly and seal arrangement therein A drum brake assembly having a wheel cylinder mounted on arms of a center guide backing plate by means of notches receiving the arms. The cylinder has pistons with low drag O-ring seals in grooves configured to provide seal forces which are aided by brake... | 10/01/1985 |
| 4429620 | Hydraulically operated actuator A hydraulically operated actuator employs multiple metal-to-metal static seals to isolate the hydraulic fluid and to isolate the actuator from surrounding contaminating (ambient) fluids. A housing contains at least two linearly spaced apart chambers. A pi... | 02/07/1984 |
| 4346685 | Internal combustion engine with gas sealing device An internal combustion engine having a gas sealing device including an L-shaped keystone piston ring groove formed on the outer circumferential surface of a piston, and an L-shaped keystone piston ring in pressing contact with the inner surface of a cylin... | 08/31/1982 |
| 4346903 | High-pressure seal in piston A high-pressure seal having a dynamic seal ring and a static seal ring supported by a backup ring is improved upon such that support ring is a one-piece construction having sealing chambers respectively defined together with the bore wall of the cylinder ... | 08/31/1982 |
| 4211149 | Split lock ring for locking actuator and method for manufacturing the same A radially expandable and contractable split lock ring selectively to unlock and lock a piston and cylinder actuator includes at least one lapped axially extending surface substantially conforming to the surface of the cylinder or piston with which it is ... | 07/08/1980 |
| 4196909 | Piston and sealing head therefor The invention pertains to the sealing of pistons for pressurizing, pumping and displacing aggressive liquids and organic solvents. The design includes the sealing head proper and its attachment to the piston. Owing to its shape and material it is made of,... | 04/08/1980 |
| 4138125 | Piston ring with expansive force responsive to pressure The lower side of a piston ring slants downwardly in an outwardly direction at an acute angle to its upper side that is perpendicular to the wall of the piston. Spacings along the upper side and inward side of the ring permits conduction of gas for pressi... | 02/06/1979 |
| 4109921 | Seal for pistons and piston rods of cylinder-type actuators An annular seal for pistons and piston rods of cylinder-type actuators, especially hydraulic actuators, where a first sealing ring of highly elastic material is received inside an annular groove in such a way that a sharp edge of the ring exerts an elevat... | 08/29/1978 |
| 4027816 | Seal assembly An improved seal assembly for sealing between relatively movable members in an oil tool or the like including a split protective ring held in position by a seal ring having a circumferential locking shoulder.... | 06/07/1977 |
| 3980310 | Ring manufacture, productive of face contact seal Methods, apparatus, and improved structure having as their common basis the sequence of collapsing a piston ring in a fixture approximating engine bore diameter, and separately lapping a major portion of the ring side and a remaining locality --narrow in ... | 09/14/1976 |
| 3971298 | Piston assembly with compression and guiding rings A piston assembly adapted for use in nonlubricated high pressure compressors, comprising a piston having a plurality of peripheral grooves therein with a ring assembly in each groove constituted of one seal ring and one guide ring in a common groove. The ... | 07/27/1976 |
